The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2002
Filed:
Dec. 07, 1999
Jiro Watanabe, Hiratsuka, JP;
Kazuto Yamakawa, Hiratsuka, JP;
Daisuke Kanenari, Hiratsuka, JP;
Noriaki Kuroda, Kawasaki, JP;
Gou Kawaguchi, Hiratsuka, JP;
Yuichi Hara, Hiratsuka, JP;
Tetsuji Kawazura, Hiratsuka, JP;
Shigeru Yamauchi, Hiratsuka, JP;
Hideo Nemoto, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A thermoplastic elastomer composition dynamically vulcanized to a gelation rate of 50 to 95% which is superior in heat resistance and durability while maintaining flexibility and superior in air permeation preventive property which can be efficiently used as, for example, a pneumatic tire as an air permeation preventive layer. In particular, a thermoplastic elastomer composition having a reduced particle size of the domain rubber is produced by a material having a high rubber ratio by mixing a composition (C) mixed under conditions of a ratio of melt viscosities of the rubber composition (A)/resin (B) of 0.8 to 1.2 and the formula (&phgr; /&phgr; )×(&eegr; /&eegr; )<1.0 under conditions of a ratio of melt viscosities of the rubber composition (D)/composition (C) of 0.8 to 1.2 and the formula (&phgr; /&phgr; )×(&eegr; /&eegr; )<1.0, wherein &phgr; : volume fraction of rubber composition (A), &phgr; : volume fraction of resin (B), &eegr; : melt viscosity of rubber composition (A), &eegr; : melt viscosity of resin (B), &phgr; : volume fraction of composition (C), &phgr; : volume fraction of rubber composition (D), &eegr; : melt viscosity of composition (C), &eegr; : melt viscosity of rubber composition (D).